• 디지털산업정보학회논문지
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• 제5권1호
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• pp.43-49
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• 2009

Network industry is complex combined with various fields of industry, such as communication, broadcast, construction, and home appliances. Moreover, it's fairly lucrative since the growth industry makes lots of added values, interacting with the others. The network industry, usually called 'Ubiquitous', connects some home appliances and makes an integrated system that you can use them with whenever and wherever. A demand for network security, however, has skyrocketed due to the relatively low safety. It's been expected that the market of home security is going to be grown up nearly 30 percent every year. Recently, analog surveilance cameras have been replaced with digital ones, and they will be providing stronger security services taking advantage of mutual interaction with related industies. In this paper, a mobile monitoring system for home security is proposed, which makes it possible to supervise all home appliances wherever you're, using the conventional wired/wireless network infra.

• 한국산업정보학회논문지
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• 제4권4호
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• pp.137-142
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• 1999

본 논문은 리눅스 서버 환경에서 여러 분야의 업무를 운영하려고 할 때에 발생되는 보안 문제를 해결하기 위해서 역할기반 접근제어(Role-Based Access Control : RBAC) 기법을 이용하여, 리눅스 환경에서 운영 가능한 RBAC＿Linux 보안 시스템을 설계하였다. 본 논문에서 RBAC_Linux는 RBAC 기법을 리눅스 환경에 적용하여 설계되었으며, 적용한 RBAC 모델로는 Sandhu 등이 제안한 RBAC96모델을 이용한다. 따라서 리눅스 서버 시스템에 설계 제안된 RBAC_Linux 보안 시스템을 이용하면 서버의 소스코드를 수정없이 구현 가능하여, 이식성이 높으며, 보안 관리가 단순하고 용이하다는 장점을 갖는다.

• 전기학회논문지
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• 제67권12호
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• pp.1577-1586
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• 2018

The emergence of the Smart Grid is an integrated solution for the next generation power system that combines IT technology in the power system to create optimal energy utilization and various services. However, these convergence technologies (power systems and information communications) are not only improving the related technologies but also producing various problems especially exposure to cyber risk. In particular, the intelligent power grid has security vulnerabilities through real-time information sharing among various organically linked systems, and it is more complicated than the cyber risk problem in the existing IT field and is directly connected to national disaster accidents. Therefore, in order to construct and operate a more stable smart grid, this paper analyzes the system of power system control system in Korea, and proposes a cyber security element definition and a countermeasure establishment method of power monitoring & control systems based on security standards of smart grid (No. SPS-SGSF-121-1-1).

• International Journal of Computer Science & Network Security
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• 제23권3호
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• pp.161-168
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• 2023

It is a common practice to use a password in order to restrict access to information, or in a general sense, to assets. Right selection of the password is necessary for protecting the assets more effectively. Password finding/cracking try outs are performed for deciding which level of protection do used or prospective passwords offer, and password cracking algorithms are generated. These algorithms are becoming more intelligent and succeed in finding more number of passwords in less tries and in a shorter duration. In this study, the performances of possible password finding algorithms are measured, and a hybrid algorithm based on the performances of different password cracking algorithms is generated, and it is demonstrated that the performance of the hybrid algorithm is superior to the base algorithms.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2174-2177
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• 2003

Internet is exposed to network attacks as Internet has a security weakness. Network attacks which are virus, system intrusion, and deny of service, put Internet in the risk of hacking, so the damage of public organization and banking facilities are more increased. So, it is necessary that the security technologies about intrusion detection and controlling attacks minimize the damage of hacking. Router is the network device of managing traffic between Internets or Intranets. The damage of router attack causes the problem of the entire network. The security technology about router is necessary to defend Internet against network attacks. Router has the need of access control and security skills that prevent from illegal attacks. We developed integrated security management framework for secure networking and kernel-level security engine that filters the network packets, detects the network intrusion, and reports the network intrusion. The security engine on the router protects router or gateway from the network attacks and provides secure networking environments. It manages the network with security policy and handles the network attacks dynamically.

• 한국정보보호학회:학술대회논문집
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• 한국정보보호학회 2001년도 종합학술발표회논문집
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• pp.340-347
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• 2001

MAC(Mandatory Access Control)이나 MLS(Multi Level Security) 보안정책이 적용된 보안운영체제는 주체와 객체에 보안등급(Security Level)과 영역(Category) 값을 부여하고, 부여된 이들 정보에 의해 객체에 행해지는 주체의 접근을 제한한다. 하지만, 이러한 MAC과 MLS 보안이 적용된 경우라 하더라도 시스템의 보안정책을 위반하며 불법적 정보를 유통하게 하는 경로가 있을 수 있다. 본 논문에서는 불법적 정보의 유통경로가 되고 있는 IPC(Inter Process Communication) 메커니즘과 스토리지에 의한 비밀채널을(Covert Channel) 문제 해결 위해 커널 수준의 설계와 구현을 시도하였다. IPC 메커니즘에 의한 불법적 정보흐름 제거를 위해 IPC 메커니즘에 MLS 보안정책을 적용하였고, 스토리지 비밀채널는 시스템 콜 명세를 분석하여 이를 식별, 감사, 지연처리가 가능토록 하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권4호
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• pp.671-690
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• 2010

The continuous growth of attacks in the Internet causes to generate a number of rules in security devices such as Intrusion Prevention Systems, firewalls, etc. Policy anomalies in security devices create security holes and prevent the system from determining quickly whether allow or deny a packet. Policy anomalies exist among the rules in multiple security devices as well as in a single security device. The solution for policy anomalies requires complex and complicated algorithms. In this paper, we propose a new method to remove policy anomalies in a single security device and avoid policy anomalies among the rules in distributed security devices. The proposed method classifies rules according to traffic direction and checks policy anomalies in each device. It is unnecessary to compare the rules for outgoing traffic with the rules for incoming traffic. Therefore, classifying rules by in-out traffic, the proposed method can reduce the number of rules to be compared up to a half. Instead of detecting policy anomalies in distributed security devices, one adopts the rules from others for avoiding anomaly. After removing policy anomalies in each device, other firewalls can keep the policy consistency without anomalies by adopting the rules of a trusted firewall. In addition, it blocks unnecessary traffic because a source side sends as much traffic as the destination side accepts. Also we explain another policy anomaly which can be found under a connection-oriented communication protocol.

• 조명전기설비학회논문지
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• 제24권10호
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• pp.58-66
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• 2010

This paper shows an implementation and management result of wireless networks based security light control system, which performs a great role in protection of pedestrians and prevention of crime. Conventional security light units have severe limits in confirmation and inspection of security light unit failure, like wilful damage by someone or failure by influence of other equipment or failure by spontaneous heat-increase, and so on. In addition, local government offices are responsible for maintenance of security light units and as a matter of fact, most of civil complaints are about security light units. It is an obvious that the existing security light maintenance system reaches the limit and the security light maintenance problem is a difficulty of local government. Therefore, efficient security light control system is needed, which enables central control and intelligent maintenance. Moreover, the system has to be easy to control and has to be stable. In this study, wireless sensor network based security light control system is implemented, which is independent of programming language and platform, and which is simple to control and extend the system. The proven protocols, HTTP and SOAP, are utilized in order to improve the system reliability. This paper shows the excellence of our proposed system by implementing and operating it in real environment.

• 정보보호학회논문지
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• 제29권3호
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• pp.657-673
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• 2019

최근 운항되고 있는 선박은 전자해도시스템 및 자동위치식별장치 등 다양한 IT, OT 시스템이 사용되고 있어 선박건조와 항해 환경까지 고려한 보안 요소가 요구된다. 하지만, 선박과 조선 ICT 기자재 산업에 관한 사이버보안 연구는 아직 부족한 현실이며, 위협 모델링을 통한 체계적인 방법론이 부족하다. 본 논문에서는 선박 시스템에 접근하는 이해관계자를 고려하여 Data Flow Diagram을 수립하였다. 선박 시스템들의 보안 취약점과 사례들을 수집한 Attack Library를 기반으로 STRIDE 방법론과 Attack Tree를 활용한 위협 모델링을 통해 선박에서 발생 가능한 위협을 식별하고 선박 사이버보안 대책을 제시하고자 한다.

• 스마트미디어저널
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• 제13권3호
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• pp.45-52
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• 2024

오늘날 점점 증가하는 위협 환경에서는 보안 이벤트에 대한 신속하고 효과적인 탐지 및 대응이 필수적이다. 이러한 문제를 해결하기 위해 많은 기업과 조직에서는 다양한 보안관제시스템을 도입하여 보안 위협에 대응하고 있다. 그러나 기존 보안관제시스템은 보안 이벤트의 복잡성과 다양한 특성으로 인해 어려움을 겪고 있다. 본 연구에서는 인공지능 기반의 자동화된 통합보안관제시스템 모델을 제안하였다. 인공지능 기술인 딥러닝을 기반으로 하여 다양한 보안 이벤트에 대해 효과적인 탐지와 이를 처리하는 기능들을 제공한다. 이를 위해 모델은 기존의 보안관제시스템 한계를 극복하기 위하여 다양한 인공지능 알고리즘과 머신러닝 방법을 적용한다. 제안된 모델은 운영자의 업무량을 줄이고 효율적인 운영을 보장하며 보안 위협에 대한 신속한 대응을 지원하게 될 것이다.